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发明公开
CN103966503A 叉车门架用高强度H型钢及其制造方法 有权

叉车门架用高强度H型钢及其制造方法
摘要：
本发明公开了一种叉车门架用高强度H型钢及其制造方法，该制造方法包括以下步骤：(a)初炼铁水；(b)采用转炉初炼钢水；(c)调整钢水的V含量为0.05wt％～0.1wt％、Ni含量为0.1wt％～0.2wt％，并在钢水的P含量不超过0.010wt％时，向钢包出钢；(d)在向钢包出钢的过程中，调整钢水中的Si、Mn、Nb和O含量；(e)在钢包精炼炉中调整钢水的C和O含量；(f)对钢水进行连铸，以得到连铸铸坯；(g)对连铸铸坯进行粗轧、精轧以及矫直，从而得到叉车门架用高强度H型钢。
摘要（英）：

The invention discloses high-strength H-shaped steel for a mast of a forklift truck and a manufacturing method thereof. The manufacturing method comprises the following steps: (a) obtaining primary molten iron; (b) adopting the converter primary molten iron; (c) adjusting the content of V in the molten iron to 0.05wt%-0.1wt% and the content of Ni in the molten iron to 0.1wt%-0.2wt%, and when the content of P in the molten iron does not exceed 0.010wt%, tapping to steel ladles; (d) adjusting the content of Si, Mn, Nb and O in the molten iron in a process of tapping to the steel ladles; (e) adjusting the content of C and O in the molten iron in a steel ladle refining furnace; (f) carrying out continuous casting on the molten iron so as to obtain a continuous casting blank; and (g) roughly rolling, precisely rolling and straightening the continuous casting blank, thus obtaining the high-strength H-shaped steel for the mast of the forklift truck.

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